.cover{
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.4);
}
.content{
    width: 500px;
    margin: 200px auto;
    background-color: white;
}
.title{
    padding: 30px;
    border-bottom: 1px solid black;
}